Mump \Mump\, v. t. [imp. & p. p. {Mumped}; p. pr. & vb. n. {Mumping}.] 1. To utter imperfectly, brokenly, or feebly. Old men who mump their passion. --Goldsmith. 2. To work over with the mouth; to mumble; as, to mump food. 3. To deprive of (something) by cheating; to impose upon.